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Vulnerability discovered: November 23, 2010
Discovered by: Daniël Niggebrugge, Fox-IT BV (https://www.fox-it.com/)
Reported to vendor: November 30, 2010
Fix available: Yes

PRODUCT

DotNetNuke is an open source Content Management System (CMS) based on Microsoft
ASP.NET. DotNetNuke powers over 600,000 production web sites worldwide. More
information can be found at:
http://www.dotnetnuke.com/Intro/AtAGlance/tabid/1579/Default.aspx

VULNERABILITY

An anonymous attacker can upload ASPX files, access these files and is then able
to execute arbitrary commands on the web server. This leads to full compromise of
the DotNetNuke environment and possibly compromise of other web applications and/or
information on the web server.

Fox-IT verified DotNetNuke version 05.06.00 (459) to be vulnerable to this issue.

FIX

This issue has been fixed in DotNetNuke version 05.06.01. Fox-IT advises to test
and deploy this new version as soon as possible.

DETAILS

The vulnerability is caused by several web pages of DotNetNuke that insufficiently
enforce authorization checks. Depending on the function of the vulnerable web page,
several issues might arise. The most severe issue makes it possible to upload
executable files without proper authorizations and execute arbitrary commands on
the web server.

REFERENCES

Original report:
http://www.fox-it.com/en/news-and-events/news/recent-news/news-article/dotnetnuke-remote-code-execution-vulnerability-discovered-by-fox-it/174

DotNetNuke security bulletin:
http://www.dotnetnuke.com/securitybulletinno46/tabid/2113/Default.aspx